First Real, Airsoft RPG

I had an idea and drew up some schematics for a spark initiated bottlerocket projectile with airsoft bbs inside; taking the fuse out; loading the custom made bottlerocket jury rigged with airsoft bbs through the top back; and with a trigger hammer spark mech. to initiate the launch with a spark instead of a fuse... With a rifled barrel for enhanced accuracy; what are your thoughts? Too dangerous for play; too costly per shot? Battlefield effectiveness?

This is considered pyrotechnics and is not allowed on this forum... Also, it is illegal to shoot bottle rockets are living things or property because they are considered an explosive. Bottle Rockets have sent people to the hospital and cause major damage. A friend of mine had one tip over and launched at her and she now has a fake eye and a burnt face.
Mods please close